2015 has seen a massive increase in commercial and industrial stair nosing and TGI (Tactile Ground Indicator) retrofits.
The driving force behind this increase is are the changes in the BCA (Building Code of Australia) and the revised AS 4586.
For the sake of simplicity I wanted to identify the main points that are covered in both the original AS1428.1 and the AS 4586 revision dealing with Stair Nosing and TGI's. The BCA states that all public access stairways (except a fire-isolated stairway) with two (or more) continuous steps is considered a stairway and will trigger the requirement for Nosing, TGSIs and handrails etc.
- Provide tactile ground surface indicators (TGSIs) in accordance with AS/NZS1428.4.1 to top and bottom landings of stairs.
- Contrasting strips required between 50mm and 75mm in depth, extending across the full width of each stair nosing with a minimum luminance contrast of 30% to the background in accordance with AS1428.1
- Stair not to have open or translucent risers
- Stair nosings must not have any projections or overhangs and nosing profiles need to be appropriately designed.
- A stair that intersects at a property boundary is to be set back a minimum of 900mm
Nosing strips must comply with AS1428.1, Clauses 11.1(f) & 11.1(g).
- Contrasting strips are required between 50mm and 75mm in depth, extending across the full width of each stair nosing with a minimum luminance contrast of 30% to the background in accordance with AS1428.1, Clauses 11.1(f) & 11.1(g).
- Please also note that BCA 2014, Clause D2.13(a)(v) now requires a class P4 slip-resistant surface provided to each stair nosing strip or stair tread, where there is the potential for the area to be wet (i.e. outside) and a rating P3 when the stair is in dry conditions (AS4586:2013). The same ratings are applicable to the stair landings.
If you wold like more information regarding the retrofitting of compliant stair nosing or TGI's please contact us any time at www.frictionsystems.com.au